Understanding layers in a web application

I am a UI developer and would like to understand various applica开发者_运维知识库tion layers like UI layer, Service layer, etc

Could you please explain in easy to understand terms what role each layer performs? Also how do you determine which architecture to use?

Please provide some easy online references if you can. Thanks.

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I did a write up along the lines you're after here.

The 5-Layer Architecture is primarily concerned with the logical and physical partitioning of code into packages which support reuse.

As you can see from the diagram below, it partitions the system into (surprise!) 5 Layers. Unlike a lot of other architectures that focus on the "main horizontal" layers (like the UI, BL and DAL) the 5-Layer Architecture formally recognises other parts as a logical layer that deserves equal recognition. Please read the formal description (link above) for a full and proper introduction.

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well it very vast concept to be summarized here....but MVC is undoubtedly most important and famous architecture in web application domain. V- view layer which is related to how data is presented to user. M-model layer which specifies business model and logic. This layer can further be divided into sub layers:- most important ones:- service layer(all servicing code goes here) and resources layer for e.g. Database C-Controller layer which acts as a glue between view and model layer. It is decision maker controlling the flow of application.

You can start with below link:-

http://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller In above wiki, there are many links for language specific implentation which you can further take it up.